ME 392 Chapter 5 Spin Balancing ME 392 Chapter 5 Spin Balancing February 21, 2012 week 7 part 2 Joseph Vignola

Approach to Lab Measurements In the first lab basic approach I like to use for experiments

Approach to Lab Measurements In the first lab basic approach I like to use for experiments All measurements parameters defined as LabVIEW controls and passed into a data file along with the data.

Approach to Lab Measurements In the first lab basic approach I like to use for experiments All measurements parameters defined as LabVIEW controls and passed into a data file along with the data.

Approach to Lab Measurements In the first lab basic approach I like to use for experiments All measurements parameters defined as LabVIEW controls and passed into a data file along with the data.

Approach to Lab Measurements In the first lab basic approach I like to use for experiments All measurements parameters defined as LabVIEW controls and passed into a data file along with the data. Literal file and variable names “sampling_frequency” “accelerometer_data” “iteration_number” “smith_lab1_filter.vi” “smith_lab1_filter.m” “smith_lab1_data.mat”

Approach to Lab Measurements In the first lab basic approach I like to use for experiments All measurements parameters defined as LabVIEW controls and passed into a data file along with the data. Literal file and variable names Fully automated Matlab script for processing, plotting and saving results in final form

Approach to Lab Measurements In the first lab basic approach I like to use for experiments All measurements parameters defined as LabVIEW controls and passed into a data file along with the data. Literal file and variable names Fully automated Matlab script for processing, plotting and saving results in final form Save unprocessed data in LabVIEW

This Week Assignment 4 is due Friday, February 24

This Week Assignment 4 is due Friday, February 24 Lab 2 is due next Friday, March 2

This Week Assignment 4 is due Friday, February 24 Lab 2 is due next Friday, March 2 In both case you will record accelerometer signals

This Week Assignment 4 is due Friday, February 24 Lab 2 is due next Friday, March 2 In both case you will record accelerometer signals The accelerometers have a sensitivity of something like

Assignment 4 Your assignment 4 submission should have 1)MS Word file that explains what you did for each part of the assignment 2)One or more LabVIEW VIs that you used for the assignment 3)Several different m-files, one for each part of the problem You can work with only one other person, list their name in the MS Word file as your lab partner Each of you should collect and process different data

Lab 2 In the second lab you will be asked you reduce imbalance induced vibrations in a spinning disk

Lab Reports You should follow the structure used for the first lab report for the next three lab reports You can’t use any text from lab report 1 unless you wrote it You must: write all your own text make your own figure collect your own data

Lab Reports You should follow the structure used for the first lab report for the next three lab reports Make sure your figures are readable

Lab Reports You should follow the structure used for the first lab report for the next three lab reports Label axes with physical units like displacement (m) or time (s) rather than voltage (V) Make sure your figures are readable

Lab Reports You should follow the structure used for the first lab report for the next three lab reports Label axes with physical units like displacement (m) or time (s) rather than voltage (V) Make sure your figures are readable

Lab Reports You should follow the structure used for the first lab report for the next three lab reports Label axes with physical units like displacement (m) or time (s) rather than voltage Make sure your figures are readable No titles above the plots

Lab Reports You should follow the structure used for the first lab report for the next three lab reports Label axes with physical units like displacement (m) or time (s) rather than voltage Make sure your figures are readable No titles above the plots Figure 1. The displacement response of the … Used numbers captions below the figure

Lab Reports You should follow the structure used for the first lab report for the next three lab reports Label axes with physical units like displacement (m) or time (s) rather than voltage Make sure your figures are readable No titles above the plots Figure 1. The displacement response of the … Used numbers captions below the figure

Lab 2 In the second lab you will be asked you reduce imbalance induced vibrations in a spinning disk Step 1) measure the vibration induced your spinning disk By measuring the acceleration for the motor frame AC couple the data and integrate double integrate the data to get displacement. Calculate the RMS displacement, R o

Lab 2 In the second lab you will be asked you reduce imbalance induced vibrations in a spinning disk Step 2) make three more measurements with a trial mass at 0°, 120° and 240° And calculate the RMS displacements, R 1, R 2 and R 3

Lab 2 In the second lab you will be asked you reduce imbalance induced vibrations in a spinning disk Step 3) calculate the imbalance parameters using Note the separation angle is

Lab 2 In the second lab you will be asked you reduce imbalance induced vibrations in a spinning disk Step 4) using T, the weight of your trial mass and the equation below, calculate a correction mass and angular location Note used atan2.m Where r u is the radial distance to the correction mass r t is the radial distance to the trial masses

Lab 2 In the second lab you will be asked you reduce imbalance induced vibrations in a spinning disk Step 5) Determine the RMS displacement (presumably reduced) with the correction mass. Note: all five measurements should be made at the same motor speed.

Lab 2 In the second lab you will be asked you reduce imbalance induced vibrations in a spinning disk Step 5) Determine the RMS displacement (presumably reduced) with the correction mass. Note: all five measurements should be made at the same motor speed. Punch line statement for the conclusions How much did the imbalance induced vibration change from step 1 to step 5?